My old-school impact wrench loosened the tensioners with no trouble. Now I'm ready to perform the sacrilege on the crankcase. Can't happen until I have the Solution in hand, however. I need its flange in order to precisely mark where the notch will be. The alteration is sacrilegious, true, but it shall be done with precision, and not like the one below, which looks like it was done by someone who got carried away with nibbler pliers. Once material is removed from the crankcase, it ain't comin' back.